Machine for saving waste pulp.



E. F. PARKER.

MACHINE FOB. SAVING WASTE PULP.

APPLICATION FILED APR. 26, 1909 942,925. Patented Dec. 14, 1909 5'. W.ZMJVZL KWQQM *tmi EDWARD F. PARKER, OF FAIRFIELD, MAINE.

MACHINE FOR SAVING WASTE PULP.

Specification of Letters Patent.

Application filed April 26, 1909. Serial No. 492,852.

To all whom it may concern:

Be it known that I, EDWARD F. PARKER, a citizen of the United States ofAmerica, and a resident of Fairfield, in the county of Somerset, Stateof Maine, have invented certain new and useful Improvements in Machinesfor Saving Waste Pulp, of which the following is a specification.

My invention relates to a device for saving waste pulp such as is usedin pulp and paper mills and known in the trade as a save-all Thesedevices are used for collecting the small particles of pulp which escapein the waste water from the wet machines, dry machines and papermachines as well as what passes off with the spent liquor and from othersources.

The waste pulp is in the form of fine particles or fibers suspended in arelatively great bulk of water and the pulp is collected in small wetmachines having their cylinders covered with very fine wire gauzewhereby substantially all the fibers are caught and taken off onto thecouch roll. The defect of these machines as they have heretofore beenmade was that while the small particles of pulp could be easilycollected on the couch roll it was very difficult to remove it from thecouch roll because the amount of pulp on the couch at any one time wasnot sufficient to form a web of paper which could be taken off in. theordinary way and it could not be successfully scraped off by means ofordinary scrapers.

The object of my invention is to construct a machine of this type inwhich the fine particles of pulp may be readily removed from the couchroll or other collecting member. This I accomplish by providing aconcentrating member preferably in the form of a flexible apron whichrubs against the surface of the collecting member and by which the smallparticles are rolled together and gathered into bunches which increasein size until they are large enough to drop off and be collected.

For the purpose of illustration I have shown in the accompanying drawinga wet machine provided with my invention in the general form in which Iprefer to use it but it is to be understood that it may be constructedin a great variety of ways.

In the drawing, Figure 1 is an end elevation of av wet machine with myspecial parts applied to it. Fig. 2 is a plan of the same.

Figs. 8 and 4 show modified forms of the apron or rubbing member.

In order to apply my invention the pulp in small detached particles isfirst collected on some form of stationary or movable collecting deviceas the couch roll of a wet machine such as herein shown.

Considering Figs. 1 and 2, A is the tank of a wet machine, a the feedspout, a the waste water duct, B the cylinder, 6 the cyl inder drivingpulley and C the couch roll, these parts being constructed in the wellknown manner of wet machines such as are used in paper and pulp millsfor the collection of pulp from the water in which it is suspended. Toremove the particles of pulp from the couch roll, I provide aconcentrating member which rubs against its surface preferablyconforming to the surface so as to have considerable contact therewith.As shown in Figs. 1 and 2, I make use of an apron of some suitableflexible material as coarsely woven woolen or cotton fabric, rubher. orfelt and so held as to rub or draw.

along the surface of the roll as the latter revolves. The apron isrepresented at D and it is confined by its front edge between twoclamping bars d and (5 supported on the brackets (Z secured to theuprights which carry the ournal bearings of the couch roll. The apron Dextends over the couch roll to the rear side thereof where its rear edgeis secured to a tightening device here shown as a roll 6 by which it isheld taut in contact with the couch roll. The roll 6 is mounted on ashaft 0 which is journaled in brackets e secured to the uprights 0 Meansare provided for maintaining any desired tension on the apron and forthis purpose I secure on one end of the shaft 0 a pulley f having a cord7 secured to its periphery said cord passing over a pulley f and havingsuspended at its end a weight f which may be varied according to theamountof tension desired. The bunches of pulp as they fall from thecouch roll where the apron ends its contact are deflected and directedto a suitable receptacle not here shown. I show here for that purpose aroll 9 journaled beneath the roll 6 and adapted to run in contact withthe couch roll but at a greater speed. The roll 9 is journaled insliding bearings g the position of which may be adjusted horizontally bymeans of an adjusting screw g journalccl in fixed up- Patented Dec. 14,1909.

. rights A hand wheel 9 is provided for turning the screw g and byturning this hand Wheel the roll may be moved toward or from the couchroll and the contact between the two be accurately regulated. The roll 9is rotated by a pulley 0 which is belted to a pulley 0 on the end of theshaft of the couch roll. The function of the roll g is to clean off anywaste pulp which may stick to the couch after leaving the apron and tothrow all the bunches of pulp as they fall from the couch onto thedeflecting plate h which is so placed as to guide the saved pulp awayfrom the machine and into a suitable receptacle. For the purpose ofmaking the roll effective I secure to its surface strips of felt g orother fibrous material which act to keep the couch roll clear.

From what has been said the operation of the machine will be readilyunderstood. The particles of pulp are first collected on the surface ofthe cylinder and transferred thence to the couch roll. As the particlescome under the apron they are rolled up into small rolls or bunchesgathering more fibers as they roll until when they reach the rear end ofthe apron they have attained considerable size varying in ordinarypractice from 1/8 to 3/8 inches in diameter and from'2 to 8 inches inlength. In this condition they fall readily from the couch roll whenthey leave the apron and being caught on the surface of the roll 9 arethrown back falling on the deflecting plate 72, and thence into thereceptacle provided for them. The pulp as thus formed has a large partof the water taken out, it may be readily handled in a variety of waysand it beats up readily in the regular beating engines.

It is evident that various devices may be used as a substitute for theflexible apron above described, any device which can be made to rub overthe surface of the couch or other collecting member being effective toproduce the rolling effect of the fibers whereby they are aggregated toform rolls or bunches.

In Fig. 3, I show a rigid rubbing member j pivoted at j and bearlngagainst the surface of the couch roll 2' and in Fig. 4: I show aflexible apron made up of rigid strips 11% secured together by aflexible connection a and held at a. In each of these cases the rollingeffect will be produced on the fiber but the best results will beattained with an apron such as described which is flexible in alldirections so that the formation of a relatively large bunch will notlift the apron out of contact with the roll but will allow it to hug theroll closely at all times. The rubbing effect may be produced by onefixed roll resting on a movable roll but it is better to have thesurfaces contact for a considerable distance so as to give the bunch offibers time to grow to suitable size by constant accretions of fibrousparticles and it is evident that the larger the couch and the longer thecontact surface which the apron makes with the roll, the larger will bethe rolls of pulp as they fall off.

I claim:

1. In a machine for saving waste pulp the combination of a collectingmember, adapted to collect the pulp in small particles on its surface, ayielding concentrating member having a flat face adapted to drag acrossthe surface of the collecting member to gather the particles intobunches.

2. In a machine for saving waste pulp the combination of a movablecollecting member adapted to collect the pulp in small particles on itssurface, a yielding concentrating member having a flat face adapted todrag across the surface of the collecting member.

3. In a machine for saving waste pulp, the combination of a movablecollecting member adapted to collect the pulp in small particles on itssurface, a fixed and yielding concentrating member having a flat faceadapted to drag across the surface of the collecting member.

4. In a machine for saving waste pulp,the combination of a roll adaptedto pick up the pulp in small particles and a yielding concentratingmember having a flat face adapted to drag across the surface of the rollto concentrate .the particles.

5. In a machine for saving waste pulp, the combination of couch roll anda yielding concentrating member having a fiat face cooperating with thecouch roll and adapted to drag across its surface.

6. In a machine for saving waste pulp the combination of a roll forcollecting the pulp in small particles on its surface and a flexibleconcentrating member having a flat face and adapted to drag across thesurface of said roll.

7. In a machine for saving waste pulp, the combination of a roll forcollecting the Julp in small particles on its surface and a exible apronheld in contact with the surface of said roll.

8. In a wet machine for saving waste pulp, the combination with thecouch roll of a flexible apron held in contact with the surface of saidroll.

9. In a wet machine for saving waste pulp the combination with the couchroll of an apron of flexible material secured on the front side of theroll and resting on and extending over to the rear side of said roll.

10. In a wet machine for saving waste pulp, the combination with thecouch roll of an apron of flexible material secured on the front side ofthe roll and resting on and extending over the roll and means fordrawing said apron taut against the surface of the roll.

11. In a Wet machine for saving Waste pulp, the combination With thecouch roll of an apron of flexible material secured on the front side ofthe roll and resting 011 and extending over the roll and a tighteningroll to Which the rear portion of said apron is secured for drawing thesame taut over the roll.

12. In a Wet machine for saving Waste pulp, the combination With thecouch roll of an apron of flexible material secured on the front side ofthe roll and resting on and extending over the roll, a tightening rollto Which the rear portion of said apron is secured for drawing the sametaut over the roll and a tension device on said tightening roll.

13. In a Wet machine for saving Waste pulp the combination with thecouch roll of a flexible apron resting on said couch roll and a cleaningroll beneath the rear end of said apron running in contact With thecouch roll.

1%. In a machine for saving Waste pulp, the combination of a movablecollecting member adapted to collect the pulp in small particles on itssurface, a yielding concentrating member having a flat face adapted tocontact With the collecting member, said face and the approachingsurface of the collecting member forming an acute angle.

In Witness whereof I have hereunto set my hand this 23d day of April,1909.

EDIVARD F. PARKER.

Witnesses HENRY D. BnoPHY, IV. C. SIMPsoN.

